52 results about "Toluidine" patented technology

The invention relates to the field of anti-aging agents DTPD, and particularly discloses a preparation method of the anti-aging agent DTPD. The preparation method of the anti-aging agent DTPD comprises the following steps: mixing aniline and o-toluidine, stirring, heating to 50-60 DEG C, adding hydroquinone and a catalyst, carrying out condensation reaction at 100-250 DEG C, removing evaporated water in the reaction process, and stopping the reaction until water cannot be evaporated; cooling to 100-140 DEG C, filtering while the mixture is hot, and distilling to remove impurities, so as to obtain the anti-aging agent DTPD; the catalyst is selected from one or more of benzene sulfonic acid, benzene disulfonic acid, p-toluenesulfonic acid, p-aminobenzene sulfonic acid, aniline trisulfonic acid and sulfonated halloysite. The preparation method disclosed by the invention has the advantages of high content of effective components in the product, simplicity and convenience in operation and safety.

The invention discloses high-wear-resistance tread rubber for a mine tire and a preparation method of the high-wear-resistance tread rubber, and relates to the technical field of tires. According to the invention, the ATT-Si / AL additive is creatively introduced and used together with carbon black as a wear-resistant main body, and an alkaline accelerator formaldehyde p-toluidine condensation compound and a conventional accelerator are synergistically applied to a wear-resistant tread rubber system for the first time; wherein the accelerator formaldehyde-p-toluidine condensation compound not only provides flat vulcanization characteristic and excellent aging resistance for the rubber material, but also solves the problems of'filler-rubber 'interface weakening and stress concentration caused by high-hardness filler by activating silanization reaction and catalyzing covalent bonding between a sulfur cross-linked network and a rigid filler interface through the alkalinity of the accelerator formaldehyde-p-toluidine condensation compound; the ATT-Si / AL additive and the accelerator formaldehyde p-toluidine condensation compound cooperate to form a physical-chemical dual enhanced network, so that the tread rubber keeps high strength and high wear resistance level under extreme wear.

The application provides a process and equipment for removing m-methylaniline and indole in coking nanofiltration concentrated water, a catalyst and a preparation method thereof, and the water quality of the coking nanofiltration concentrated water is as follows: conductivity 21300-34560 muS / cm, sulfate ion 567-1340 mg / L, m-methylaniline 45-78 mu g / L, and indole 23-39 mu g / L; the process comprises the following treatment steps: the coking nanofiltration concentrated water enters the ozone catalytic tower from the bottom of the tower and flows out from bottom to top, and the ozone catalytic tower is internally provided with a modified peanut shell biochar catalyst; after the ozone catalytic reaction, the water quality of the coking nanofiltration concentrated water is as follows: conductivity 21300-34560 muS / cm, sulfate ion 567-1340 mg / L, m-methylaniline 3-7 mu g / L, and indole 1-6 mu g / L.

The invention belongs to the field of reactive dye synthesis, and discloses a preparation process of a reddish brown reactive dye, which comprises the following steps: diazotizing 2-naphthylamine-4, 6, 8-trisulfonic acid, coupling with 1-naphthylamine-7-sulfonic acid to obtain a first-couple material, diazotizing the first-couple material again, coupling with m-toluidine to obtain a second-couple material, refining the second-couple material to obtain a color base, and drying to obtain the reddish brown reactive dye. Carrying out primary condensation on cyanuric chloride and 2, 5-aniline disulfonate to obtain a primary condensation material, carrying out secondary condensation on the primary condensation material and a color base, and filtering the secondary condensation slurry to obtain the reddish brown reactive dye primary stock. The preparation process provided by the invention is stable and low in spray drying energy consumption, and the prepared primary pulp has the advantages of high purity and high solid content, and is excellent in solubility and high in fastness to washing.

The present invention relates to a synergistic antiknock fuel additive comprising a mixture of N-methyl-p-anisidine and m-toluidine in a volume ratio from 45:55 to 95:5; to the use of said fuel additive to increase the octane rating of a gasoline; and to a gasoline fuel composition comprising said fuel additive.

The invention belongs to the technical field of phase change material preparation, and particularly relates to a high-stability composite phase change material and a preparation method thereof. According to the method, an organic solid-liquid phase change material is taken as a solvent, a reaction monomer octadecyl acrylate and a cross-linking agent 1, 6-hexanediol diacrylate are subjected to a cross-linking reaction through a redox initiation system (benzoyl peroxide and N, N-dimethyl-p-toluidine), and the solid-liquid phase change material is prepared. A phase-change high-molecular polymer with a phase-change function is constructed, a coating structure is formed on the organic solid-liquid phase-change material, and finally the composite phase-change material with excellent thermal stability and high latent heat characteristics is prepared. The preparation process disclosed by the invention can be carried out under a low-temperature condition, energy consumption and production cost can be effectively reduced, the process is simple, and batch production is easy; the prepared composite phase change material has wide application prospects in the fields of energy storage, temperature control and the like.

This invention discloses a self-microporous polymer, a self-microporous ion exchange membrane, its preparation method, and its applications, belonging to the field of polymer materials technology. The polymer uses 1,3,5-tris(4-aminophenyl)benzene (TAPB), o-toluidine (DMBP), and dimethylformaldehyde as monomers. Utilizing the rigid, distorted, and non-densely stacked molecular structures of TAPB and DMBP, a polymer material with an inherent sub-nanometer microporous structure and its corresponding homogeneous ion exchange membrane are prepared. The formed self-microporous structure constructs continuous ion transport channels within the membrane, where the sub-nanometer-scale micropores impart a significant size sieving effect, thereby achieving selective separation of monovalent / polyvalent anions. Furthermore, by quaternizing the membrane material, fixed positively charged groups are introduced onto the polymer backbone. These positively charged groups generate significant electrostatic repulsion, enabling selective separation of monovalent / polyvalent cations, particularly suitable for the efficient separation of lithium and magnesium ions.

The invention belongs to the technical field of fungaltoxin detection, and particularly relates to a Raman beacon COF nanoflower and a preparation method and application thereof. The method comprises the following steps: dissolving trialdehyde phloroglucinol, o-bitoluidine and polyvinylpyrrolidone in methanol, carrying out ultrasonic uniform mixing, adding a catalyst to carry out a reaction, adding benzaldehyde after the reaction is finished, continuously carrying out a standing reaction, centrifuging, washing and redissolving to obtain TpDBD-COF nanoflowers, dissolving the TpDBD-COF nanoflowers in a mixed solution of ethanol and water, adding AgNO3, carrying out ultrasonic adsorption, and carrying out vacuum drying to obtain the TpDBD-COF nanoflowers. After adsorption is finished, trisodium citrate is added for a heating reaction, centrifugation, washing and redissolution are performed, and the Raman beacon COF nanoflower is obtained. The COF nanoflower prepared by the invention has a highly enhanced stable Raman signal, the surface group has the advantage of being directly used for biomolecule coupling, and the COF nanoflower can be specifically used for sensitively detecting T-2 toxin in a sample.

The application provides a method for synthesizing 4,4'-diamino-3,3'-dimethyl biphenyl methane, and belongs to the field of organic catalytic synthesis. The method is characterized in that o-toluidine and formaldehyde are used as raw materials, a catalyst and a reaction solvent are added, and 4,4'-diamino-3,3'-dimethyl biphenyl methane is catalytically synthesized. The synthesis route of the application has the advantages of simple reaction operation, mild conditions, avoidance of the use of hydrochloric acid, recyclability of the catalyst, high conversion rate and selectivity of the experiment, and convenience of post-treatment.

This application belongs to the technical field of mycotoxin detection technology, specifically relating to a Raman beacon COF nanoflower, its preparation method, and its application. The method involves dissolving trialdehyde phloroglucinol, o-toluidine, and polyvinylpyrrolidone in methanol, ultrasonically mixing, adding a catalyst for reaction, adding benzaldehyde after the reaction, allowing the mixture to stand, centrifuging, washing, and redissolving to obtain TpDBD-COF nanoflowers. These nanoflowers are then dissolved in a mixed solution of ethanol and water, followed by the addition of AgNO3 and ultrasonic adsorption. After adsorption, trisodium citrate is added for heating reaction, centrifuging, washing, and redissolving to obtain the Raman beacon COF nanoflowers. The COF nanoflowers prepared by this invention exhibit a highly enhanced and stable Raman signal, and their surface groups have the advantage of being directly used for biomolecule coupling, specifically for the sensitive detection of T-2 toxin in samples.

This invention discloses a method for synthesizing methyl amino-methyl-phenylcarbamate compounds from p-toluidine. The method uses p-toluidine as a raw material, employs anhydrous zinc acetate catalyst and the green solvent dimethyl carbonate, to first prepare methyl p-toluylcarbamate, followed by one-step direct amination to prepare methyl 2-amino-4-methylphenylcarbamate and methyl 3-amino-4-methylphenylcarbamate. This invention has advantages such as readily available raw materials, an environmentally friendly reaction process, high atom utilization, and a first-step reaction yield of up to 96% and a second-step reaction yield of up to 35.7%.

The present invention relates to a process for the preparation of toluene-2, 5-diamine or a salt thereof. The invention also relates to a method for preparing the toluene-2, 5-diamine sulfate. According to the method, carcinogenic and allergenic raw materials (such as o-toluidine) are not used, a brand-new synthesis route is adopted, and the method has the advantages that the used initial raw materials are easy to obtain, the reaction environment is safe, operation is easy, an intermediate is stable and easy to separate, and no use-prohibited components (such as o-toluidine) are used or generated.

The present application provides a long-life low-friction grease composition and a preparation method thereof. The grease composition comprises the following raw materials by weight: 20-35 parts of high-alkaline calcium sulfonate, 50-65 parts of base oil, 2-6 parts of diisocyanate, 1-5 parts of p-toluidine, 0.5-2 parts of urea, 1-4 parts of conversion agent, 1-2 parts of calcium carbonate, 1-2 parts of calcium hydroxide, 1-4 parts of small-molecule acid, 3-5 parts of fatty acid, 0.5-2 parts of solid friction-reducing agent, 0.5-3 parts of antioxidant, 0.5-2 parts of surfactant, and 0.5-2 parts of passivator. The grease composition has excellent friction-reducing capacity and extreme pressure performance, and has a long service life.

The present invention discloses a high-toughness non-woven fabric for homogeneous bags and a preparation method thereof, relating to the field of new materials technology. The high-toughness non-woven fabric for homogeneous bags produced in the present invention is produced by post-finishing a hydrophilic polyethylene non-woven fabric with a finishing agent. The hydrophilic polyethylene non-woven fabric is produced by first grafting glycidyl methacrylate onto the surface of the polyethylene non-woven fabric by electron beam radiation and then reacting with hydrophilic polylactic acid, thereby enhancing the hydrophilicity of the polyethylene non-woven fabric. The modified polyether ester is produced by reacting a modified phenolic resin with 2,5-furandicarboxylic acid and then with tributyl citrate. The modified phenolic resin is produced by reacting a phenolic resin with o-toluidine, thereby enhancing the toughness of the non-woven fabric.

The invention discloses low-modulus bone cement and a preparation method thereof. The solid-to-liquid ratio of powder to liquid is (2g-3g): 1mL; the powder is prepared from the following raw materials in percentage by mass: 52 to 89.5 percent of acrylic resin, 10 to 40 percent of barium sulfate and 0.5 to 8 percent of powdery phospholipid; the liquid is prepared from the following raw materials: 0.5 percent to 5 percent of N, N-dimethyl p-toluidine, 0.05 percent to 2 percent of hydroquinone and 93 percent to 99.45 percent of methyl methacrylate. The powdery phospholipid is introduced into the bone cement powder to modify the bone cement, so that the overhigh elastic modulus of the bone cement is reduced, and secondary injuries such as fracture of adjacent vertebral bodies caused by the high elastic modulus after the bone cement is filled are prevented. Meanwhile, the powdery phospholipid is uniformly distributed in the bone cement, so that the requirement that the bone cement compression strength is greater than or equal to 70MPa according to a bone cement forcing standard is met, and the requirement of human body mechanical strength support is ensured.

The application discloses a cold storage and heat preservation plastic foam and a preparation method thereof. The combined material formula comprises a boric acid polyether polyol and a high-hydroxyl-value o-toluidine polyether polyol. The boric acid polyether polyol has a characteristic of a triangular stable structure of boron atoms, and can improve the strength and dimensional stability of a plastic product and delay the attenuation of the strength and dimensional stability of the plastic product in application. The boric acid polyether polyol contains a part of insoluble B=O structure, which is easy to precipitate in the early stage of the reaction of the combined material with isocyanate, forms stable nucleation points, and through the synergistic effect of the high-hydroxyl-value o-toluidine polyether polyol, the cross-linking of product foam fibers is enhanced, the bubbles are inhibited and the bubbles are made more delicate, and the thermal conductivity of the product is reduced. The rapid cross-linking can reduce the volatilization of a foaming agent and reduce the surface bubbles at the end of product flow.

The invention belongs to the field of vinyl elastomers, and particularly relates to a flame-retardant high-strength polyethylene blow molding material and a preparation method thereof.The flame-retardant high-strength polyethylene blow molding material is prepared from 100 parts of high-density polyethylene, 20-30 parts of organic montmorillonite modified flame retardant, 3-5 parts of maleic anhydride grafted polyethylene, 0.3-0.5 part of composite antioxidant and 0.5-1.5 parts of polyethylene wax; the preparation method comprises the following steps: dispersing long-chain organized montmorillonite in toluene, adding gamma-aminopropyltriethoxysilane and triethylamine, and carrying out a reflux reaction at 80 DEG C under the protection of nitrogen for 6 hours to obtain long-chain organized montmorillonite containing active amino groups; the preparation method comprises the following steps: re-dispersing long-chain organic montmorillonite containing active amino groups in toluene, adding pentaerythritol spiro-phosphoryl p-toluidine, and carrying out a reflux reaction; the organic montmorillonite modified flame retardant is obtained; the flame-retardant high-strength polyethylene blow molding material prepared from the organic montmorillonite modified flame retardant has efficient flame retardance and excellent mechanical properties.

The present invention provides a polyimide film, comprising: a copolymer obtained by copolymerizing a dianhydride monomer comprising pyromellitic dianhydride (PMDA) and a diamine monomer comprising 4, 4 '-diaminodiphenyl ether (ODA) and m-bitoluidine (m-TD), wherein the film has a coefficient of thermal expansion (CTETD) in a transverse direction (TD) measured at a temperature range of 50 DEG C to 200 DEG C and a temperature rise rate of 10 DEG C / min of-5 ppm / DEG C to 2.5 ppm / DEG C, and a modulus of 8 GPa or more.

The application discloses a low-modulus bone cement and a preparation method thereof, and the solid-liquid ratio of powder and liquid is 2g-3g:1mL; the powder comprises the following raw materials in percentage by mass: 52%-89.5% of acrylic resin, 10%-40% of barium sulfate and 0.5%-8% of powdered phospholipid; and the liquid comprises the following raw materials: 0.5%-5% of N, N-dimethyl-p-toluidine, 0.05%-2% of hydroquinone and 93%-99.45% of methyl methacrylate. The powdered phospholipid is introduced into the bone cement powder to modify the bone cement, reduce the excessively high elastic modulus of the bone cement and prevent secondary injuries such as the fracture of adjacent vertebral bodies caused by the high elastic modulus of the bone cement after filling. Meanwhile, the powdered phospholipid is uniformly distributed in the bone cement, meets the requirement of the bone cement compression strength≥70MPa in the bone cement forced standard and guarantees the demand of human mechanical strength support.

The application provides a preparation method of direct-spun brown, and belongs to the technical field of dye synthesis, and comprises the following steps: 1) mixing and reacting 4,4'-diamino benzoyl toluidine with a sodium nitrite solution under low-temperature conditions to generate a diazonium salt solution; 2) controlling the speed of dropping the diazonium salt solution into a coupling component, stirring and reacting to obtain a primary coupling product solution; 3) in the presence of a biodegradable cosolvent, the primary coupling product solution is added into gamma acid in batches for mixing and reacting, and the material concentration in the reaction system is controlled, and when the solid content of the reaction solution is greater than or equal to 45 %, the reaction is considered to be completed, and a secondary coupling product solution is obtained; and 4) directly performing spray drying on the secondary coupling product solution to obtain a direct-spun brown product. The method improves the standard degree and saturation of the color light of the product, the color light deviation ΔE is less than or equal to 1.0, the saturation reaches more than 95 % of a standard sample, the solid content of the secondary coupling reaction is improved, the purification process is eliminated, and the production cost is reduced.

Provided is a polyimide film including: a block copolymer including a dianhydride monomer including pyromellitic dianhydride (PMDA), and a diamine monomer including 4, 4 '-diaminodiphenyl ether (ODA) and m-bitoluidine (m-TD), in which a water absorption rate measured after storage in water at room temperature (20 DEG C to 25 DEG C) for at least one day is 2.5% or less, and a water absorption rate measured after storage in water at room temperature (20 DEG C to 25 DEG C) for at least one day is 2.5% or less; and the moisture absorption rate measured after being stored for at least one day in a constant temperature and humidity chamber (at a temperature of 25 DEG C and a humidity of 50%) is 1.5% or less.

The present invention discloses a meta-toluidine compound, a preparation method thereof, and an application in a thermal color developer, and relates to the technical field of color developers. A meta-toluidine compound is. Compared with comparative products, the thermal color developer prepared by the present invention has a decreasing trend in overall activation temperature, is easier to trigger a color development reaction, broadens the color development temperature range, and can meet the differentiated temperature requirements of more different application scenarios. The thermal color developer prepared using the meta-toluidine compound of the present invention has a higher color contrast and a more significant color depth in color development effect, and can present a clearer and more vivid color development result, which helps to improve the visualization effect of thermal color development technology in scenarios such as thermal printing.

The present invention provides a low-dielectric polyimide film with excellent dimensional stability and heat resistance, comprising a block copolymer containing a first block and a second block. The first block is obtained by imidizing an acid dianhydride component containing biphenyl dianhydride (BPDA) with a diamine component containing p-phenylenediamine (PPD). The second block is obtained by imidizing an acid dianhydride component containing benzophenone tetracarboxylic dianhydride (BTDA) and pyromellitic dianhydride (PMDA) with a diamine component containing m-tolidine.

The present invention is a method for using a vanadium element as a catalyst in the reaction of toluene and a hydroxylamine salt to produce toluidine. The method comprises the following steps: adding glacial acetic acid, deionized water, hydroxylamine hydrochloride, toluene, and a vanadium element to a reactor with a stirring and condensing reflux device, heating the reactor to 60-100° C., and stirring the reactor for 1-7 hours to obtain toluidine. The present invention does not require pre-treatment of the catalyst, and vanadium element powder is directly used as a catalyst in the reaction. The catalyst is simple and easy to obtain, low in price and stable, and catalyzes the reaction of toluene and a hydroxylamine salt under mild reaction conditions to produce toluidine in a single step with high selectivity and yield.

The invention belongs to the field of biomedical materials, and relates to antibacterial bone cement, the bone cement comprises a powder and a liquid, the powder comprises polyacrylate and an antibacterial developer, and the liquid comprises N, N-dimethyl-p-toluidine, hydroquinone and methyl methacrylate; the antibacterial developing agent is a barium sulfate / copper oxide compound, the invention further provides a preparation method of the antibacterial developing agent in the antibacterial bone cement, an antibacterial bone cement set and a preparation method of the antibacterial bone cement set, the bone cement is endowed with certain antibacterial property by changing the composition of the developing agent, the elasticity modulus of the bone cement is reduced, and the bone cement set is prepared. And secondary injury caused by too high modulus of the bone cement is prevented.

The application discloses a preparation method of methyl-modified polyaniline and construction of a super capacitor with excellent cycle stability. The application introduces methyl functional groups on benzene rings by using N-phenyl-p-phenylenediamine (AD) and m-toluidine (mT) to copolymerize, weakens the intermolecular force of the polymer to control the polyaniline morphology, obtains aniline derivative copolymer Poly(AD-co-mT) (PACM) with high specific capacity, controls the intermolecular force by adopting aniline dimer and m-toluidine polymerization, thereby effectively controls the performance of polyaniline, and increases the capacity of the device. Meanwhile, the structure rupture of polyaniline in the electrochemical cycle process is repaired by using a large number of intermolecular hydrogen bonds provided by the amide bond in the hydrogen bond binder (SIR), thereby ensuring the cycle stability of the polyaniline electrode structure, and after 30000 cycles, the device has excellent capacity retention rate, and the super capacitor device with excellent stability is obtained.

The invention discloses an S-type heterojunction covalent organic framework composite catalyst and a preparation method thereof.The preparation method comprises the following steps that aromatic aldehyde, p-aniline, carbon quantum dots and a solvent are mixed and subjected to ultrasonic dispersion, and a mixed solution is obtained; mixing the mixed solution with a catalyst, and carrying out freezing-vacuumizing-nitrogen charging circulation to obtain a precursor solution; and carrying out solvothermal reaction on the precursor solution to obtain the S-type heterojunction covalent organic framework composite catalyst. According to the preparation method, aromatic aldehyde and p-aniline are taken as monomer materials and are mixed with the carbon quantum dots and the catalyst for solvothermal reaction, so that the S-type heterojunction covalent organic framework composite catalyst which is large in specific surface area, multiple in active sites, high in visible light utilization rate, high in photocatalytic activity and good in stability can be prepared; the method is widely used for removing organic pollutants in water bodies, can effectively remove the organic pollutants in different water bodies, and is high in use value and good in application prospect.

The invention discloses a preparation method of phentolamine EP impurity acid salt, which comprises the following steps: (1) taking a compound I resorcinol and a compound II p-toluidine as raw materials, and performing dehydration reaction to obtain an intermediate product III; (2) carrying out nucleophilic substitution reaction on the intermediate product III and benzyl bromide to generate an intermediate product IV; (3) carrying out nucleophilic substitution reaction on the intermediate product IV and ethyl bromoacetate to obtain an intermediate product V; (4) carrying out ester amidation reaction on the intermediate product V and N-tert-butyloxycarbonyl-1, 2-ethylenediamine to obtain an intermediate product VI; and (5) taking the intermediate product VI, and carrying out deprotection reaction to obtain a final product VII, wherein X represents hydrochloric acid, sulfuric acid, acetic acid, formic acid or trifluoroacetic acid. The purity of the prepared phentolamine EP impurity acid salt reaches 99% or above, the reaction yield is high, a test sample is provided for phentolamine research, and the phentolamine EP impurity acid salt has important research value in clinical pharmacokinetic research.

The invention discloses a technological synthesis method of 6-(N-ethyl-4-toluidine)-2-methylfluorane, and relates to the technical field of organic synthesis. The method comprises the following four steps of: (1) reacting resorcinol as shown in a formula I and p-toluidine as shown in a formula II in an acid catalysis system and an organic solvent at 110-145 DEG C for 20-28 hours to obtain a formula III; (2) carrying out reductive amination on the compound shown in the formula III and a compound shown in the formula IV (paraldehyde) in the presence of a catalyst under the hydrogen pressure of 0.1-5 MPa to obtain a compound shown in the formula V; (3) reacting the formula V with a formula VI (phthalic anhydride) in an organic solvent at 100-120 DEG C for 10-15 hours to obtain a formula VIII; and (4) carrying out dehydration condensation on the formula VIII and the formula IX (p-cresol) under an acidic condition to obtain a target product. Raw materials are easy to obtain, the yield of each step is larger than or equal to 80%, energy consumption and cost are reduced, operation safety is improved, the method is suitable for industrial production, and import dependence of high-end heat-sensitive materials can be broken through.

Unleaded aviation gasoline. An aviation gasoline fuel blend includes an unleaded aviation gasoline base fuel, with an effective amount of selected alkyl benzenes to improve the functional engine performance to avoid harmful detonation sufficient to meet or exceed selected standards for detonation performance requirements in full scale aircraft piston spark ignition engines designed for use with Grade 100LL avgas. Suitable alkylated benzenes may include a mixture of xylene isomers. Aromatic amines, such as m-toluidine, may also be added to increase MON. Base fuels may be a high quality aviation alkylate, or may be a commercial iso-octane, or a mixture of high quality aviation alkylate enhanced by iso-octane, or by commercial iso-octane mixtures, and may include iso-pentane or butane or both iso-pentane and butane in sufficient quantity to provide appropriate vapor pressure for the final fuel blend.